package com.march.controller;

import com.march.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.util.UUID;

@Slf4j
@RestController
@RequestMapping("/common")
public class CommonController{

    @Value("${reggie.path}")
    private String basePath;

    @PostMapping("/upload")
    public R<String> upload(MultipartFile file){

        System.out.println(file.toString());

        // 截取后缀
        String originFileName = file.getOriginalFilename();
        // String suffix = originFileName.split(".")[-1];
        String suffix = originFileName.substring(originFileName.lastIndexOf("."));
        // 获取文件名
        String fileName = UUID.randomUUID().toString() + suffix;
        // 创建一个目录对象
        File dir = new File(basePath);
        // 判断当前目录是否存在
        if(!dir.exists()){
            dir.mkdirs();
        }
        try {
            file.transferTo(new File(basePath+fileName));
        } catch (IOException e) {
            e.printStackTrace();
        }
        return R.success(fileName);
    }

    @GetMapping("/download")
    public void download(String name, HttpServletResponse response){


        try {
            // 输入流
            FileInputStream fileInputStream = new FileInputStream(new File(basePath + name));
            // 输出流
            ServletOutputStream outputStream = response.getOutputStream();

            response.setContentType("image/jpg");

            int len = 0;
            byte[] bytes = new byte[1024];
            while ((len = fileInputStream.read(bytes))!=-1){
                outputStream.write(bytes,0,len);
                outputStream.flush();
            }
            //关闭流
            outputStream.close();
            fileInputStream.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}
